This is a 37-year-old G₄P ₃ patient with unremarkable history. Her examination at 16 weeks demonstrated:

• micrognathia

• large fontanelles (on 3D)

• dysgenesis of the corpus callosum on the sagittal section

• choroid plexus cysts

• radial ray aplasia with club hand on one side and isolated club hand on the other

This combination of findings suggested trisomy 18 which was confirmed after termination.

Micrognathia

Large fontanelles (on 3D)

Dysgenesis of the corpus callosum on the sagittal section

Choroid plexus cysts

Radial ray aplasia with club hand on one side and isolated club hand on the other

The fetus after termination: